620251 has 2 divisors, whose sum is σ = 620252. Its totient is φ = 620250.

The previous prime is 620239. The next prime is 620261. The reversal of 620251 is 152026.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 620251 - 2⁹ = 619739 is a prime.

It is a super-2 number, since 2×620251² = 769422606002, which contains 22 as substring.

620251 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (620201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310125 + 310126.

It is an arithmetic number, because the mean of its divisors is an integer number (310126).

2⁶²⁰²⁵¹ is an apocalyptic number.

620251 is a deficient number, since it is larger than the sum of its proper divisors (1).

620251 is an equidigital number, since it uses as much as digits as its factorization.

620251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 620251 is about 787.5601564325. The cubic root of 620251 is about 85.2816951716.

Adding to 620251 its reverse (152026), we get a palindrome (772277).

It can be divided in two parts, 62025 and 1, that added together give a palindrome (62026).

The spelling of 620251 in words is "six hundred twenty thousand, two hundred fifty-one".